Membrane-based gas separation exhibits many advantages over other conventional techniques; however, the construction of membranes with simultaneous high selectivity and permeability remains a major challenge. Herein, (LDH/FAS)_n-PDMS hybrid membranes, containing two-dimensional sub-nanometre channels were fabricated via self-assembly of unilamellar layered double hydroxide (LDH) nanosheets and formamidine sulfinic acid (FAS), followed by spray-coating with a poly(dimethylsiloxane) (PDMS) layer. A CO₂transmission rate for (LDH/FAS)₂₅-PDMS of 7748 GPU together with CO₂selectivity factors (SF) for SF(CO₂/H₂), SF(CO₂/N₂) and SF(CO₂/CH₄) mixtures as high as 43, 86 and 62 respectively are observed. The CO₂permselectivity outperforms most reported systems and is higher than the Robeson or Freeman upper bound limits. These (LDH/FAS)_n-PDMS membranes are both thermally and mechanically robust maintaining their highly selective CO₂separation performance during long-term operational testing. We believe this highly-efficient CO₂separation performance is based on the synergy of enhanced solubility, diffusivity and chemical affinity for CO₂in the sub-nanometre channels.

A NiAl layered double hydroxide (LDH)@carbon nanoparticles (CNPs) hybrid electrode was fabricated via a facile and cost-effective approach and displays excellent pseudocapacitive behavior in asymmetric supercapacitors.

NiFe–Cl layered double hydroxide (LDH) is proposed as a high-capacity and long lifetime cathode material for chloride ion batteries (CIBs), which delivers a maximum capacity of 350.6 mA h g ⁻¹ and a long lifetime of 800 cycles.